[PATCH] I2O: handle __copy_from_user

Handle __copy_from_user() return value.

Noticed by inspection, not from build warning.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Markus Lidel <Markus.Lidel@shadowconnect.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/message/i2o/i2o_config.c b/drivers/message/i2o/i2o_config.c
index 7d23e082bf26..685d7a450720 100644
--- a/drivers/message/i2o/i2o_config.c
+++ b/drivers/message/i2o/i2o_config.c
@@ -265,7 +265,11 @@ static int i2o_cfg_swdl(unsigned long arg)
                 return -ENOMEM;
         }
 
-        __copy_from_user(buffer.virt, kxfer.buf, fragsize);
+        if (__copy_from_user(buffer.virt, kxfer.buf, fragsize)) {
+                i2o_msg_nop(c, msg);
+                i2o_dma_free(&c->pdev->dev, &buffer);
+                return -EFAULT;
+        }
 
         msg->u.head[0] = cpu_to_le32(NINE_WORD_MSG_SIZE | SGL_OFFSET_7);
         msg->u.head[1] =